/*
- * Copyright (C) 2012-2013 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
+ * Copyright (C) 2012-2014 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
+ * Copyright (C) 2014 Alexandre Oliva <lxoliva@fsfla.org>
+ * Copyright (C) 2014 Sergio Durigan Junior <sergiodj@sergiodj.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
+#define _GNU_SOURCE
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <gnutls/gnutls.h>
#include <zlib.h>
+#include <argp.h>
+#include "config.h"
#include "decfile.h"
#include "rnet_message.h"
#include "rnet_encode.h"
+/* Program version and bug report address. */
+
+const char *argp_program_version = PACKAGE_VERSION;
+const char *argp_program_bug_address = PACKAGE_BUGREPORT;
+
+/* Documentation strings. */
+
+static const char rnetclient_doc[] =
+ "Send the Brazilian Income Tax Report to the Brazilian "
+ "Tax Authority";
+static const char rnetclient_args_doc[] =
+ "[-d|--declaration] FILE [-o|--output-dir DIRECTORY]"
+ " [-s|--server-name SERVER]"
+ " [-c|--client-version CLIENT]";
+
+#define RNET_ADDRESS "receitanet.receita.fazenda.gov.br"
+
+/* Description and definition of each option accepted by the program. */
+
+static const struct argp_option rnetclient_options_desc[] = {
+ { "declaration", 'd', "FILE", 0,
+ "The Income Tax Report file that will be sent.",
+ 0 },
+
+ { "output-dir", 'o', "DIRECTORY", 0,
+ "The directory where you wish to save the receipt.",
+ 0 },
+
+ { "server-name", 's', "SERVER", 0,
+ "The server to connect to. Default is " RNET_ADDRESS ".",
+ 0 },
+
+ { "client-version", 'c', "CLIENT", 0,
+ "The client version to be used.",
+ 0 },
+
+ { NULL },
+};
+
+struct rnetclient_args {
+ /* File representing the declaration. */
+ char *input_file;
+
+ /* Output directory to save the receipt. */
+ char *output_dir;
+
+ /* Output filename. */
+ char output_file[PATH_MAX];
+
+ /* Server to connect to. */
+ char *server_name;
+
+ /* Client version to use. */
+ char *client_version;
+};
+
+/* Parser for command line arguments. */
+
+static error_t rnetclient_parse_opt(int key, char *arg, struct argp_state *state)
+{
+ struct rnetclient_args *a = state->input;
+ switch (key) {
+ case 'd':
+ /* The user has explicitly provided a filename through
+ the '-d' switch. */
+ a->input_file = arg;
+ break;
+
+ case 'o':
+ a->output_dir = arg;
+ break;
+
+ case 's':
+ a->server_name = arg;
+ break;
+
+ case 'c':
+ a->client_version = arg;
+ break;
+
+ case ARGP_KEY_ARG:
+ /* The user has possibly provided a filename without
+ using any switches (e.g., by running './rnetclient
+ file'). */
+ a->input_file = arg;
+ break;
+
+ case ARGP_KEY_END:
+ /* We have reached the end of the argument parsing.
+ Let's check if the user has provided a filename. */
+ if (a->input_file == NULL)
+ argp_error(state,
+ "You need to provide the Income Tax Declaration "
+ "filename.");
+ }
+
+ return 0;
+}
+
+/* Control struct used by argp. */
+
+static struct argp rnetclient_argp = {
+ rnetclient_options_desc,
+ rnetclient_parse_opt,
+ rnetclient_args_doc,
+ rnetclient_doc,
+ NULL, NULL, NULL
+};
+
static size_t chars2len (unsigned char buf[2]) {
return (buf[0] << 8 | buf[1]);
}
deflateEnd(&zstrm);
return -1;
}
- zstrm.next_in = buffer;
+ zstrm.next_in = (z_const Bytef *) buffer;
zstrm.avail_in = len;
- zstrm.next_out = *out + 6;
+ zstrm.next_out = (Bytef *) *out + 6;
zstrm.avail_out = len * 2 + 30;
while ((r = deflate(&zstrm, Z_FINISH)) != Z_STREAM_END &&
zstrm.avail_out > 0);
zstrm.opaque = Z_NULL;
if ((r = inflateInit(&zstrm)) != Z_OK)
return -1;
- *olen = chars2len(buffer+3);
+ *olen = chars2len((unsigned char *) buffer+3);
*out = malloc(*olen);
if (!out) {
inflateEnd(&zstrm);
return -1;
}
- zstrm.next_in = buffer + 6;
+ zstrm.next_in = (z_const Bytef *) buffer + 6;
zstrm.avail_in = len - 6;
- zstrm.next_out = *out;
+ zstrm.next_out = (Bytef *) *out;
zstrm.avail_out = *olen;
while ((r = inflate(&zstrm, Z_FINISH)) != Z_STREAM_END &&
zstrm.avail_out > 0);
return 0;
}
-#define RNET_ADDRESS "receitanet.receita.fazenda.gov.br"
-
-static int connect_rnet(int *c)
+static int connect_rnet(int *c, char *server_name)
{
struct addrinfo *addresses;
struct addrinfo *addr;
struct addrinfo hint;
- struct sockaddr_in saddr;
int r;
int fd = *c = -1;
- int i;
memset(&hint, 0, sizeof(hint));
hint.ai_family = AF_UNSPEC;
hint.ai_socktype = SOCK_STREAM;
hint.ai_protocol = IPPROTO_TCP;
hint.ai_flags = AI_ADDRCONFIG;
- r = getaddrinfo(RNET_ADDRESS, "3456", &hint, &addresses);
+ r = getaddrinfo(server_name, "3456", &hint, &addresses);
if (r) {
return r;
}
char buffer[16];
int r;
buffer[0] = 1;
- write(c, buffer, 1);
- write(c, "00000000000000", 14);
+ r = write(c, buffer, 1);
+ if (r < 1)
+ return -1;
+ r = write(c, "00000000000000", 14);
+ if (r < 14)
+ return -1;
r = read(c, buffer, 1);
if (r != 1 && buffer[0] != 'E')
return -1;
return 0;
}
-static void usage(void)
-{
- fprintf(stderr, "rnetclient [filename]\n");
- exit(1);
-}
-
static int rnet_send(gnutls_session_t session, char *buffer, size_t len, int header)
{
- char *out;
- size_t olen;
- deflateRecord(buffer, len, &out, &olen, header);
- gnutls_record_send(session, out, olen);
- free(out);
- return 0;
+ int r = 0;
+ /* Large files have to be uploaded as multiple
+ separately-deflated chunks, because the compressed and
+ uncompressed lengths in each record are encoded in unsigned
+ 16-bit integers each.
+
+ The header can't be split into multiple chunks, and it
+ should never have to, since it won't ever get even close to
+ 64KiB.
+
+ The uploaded file may be larger: to upload such large
+ files, it suffices to send multiple records till the entire
+ file is transferred, without waiting for a response. Since
+ we've already informed the server of the file size in the
+ header, it knows exactly how much data to expect before
+ sending a response. It will only send an error message
+ before that if it times us out.
+
+ Odds are that any reasonably large size will do, but it
+ can't be too close to 64KiB, otherwise there won't be room
+ for the compressed length should it not compress well,
+ which should never happen for capital-ASCII-only
+ declaration files, but who knows?
+
+ This chunk size worked at the first try, uploading a
+ ~100KiB file, so let's stick with it. */
+ const unsigned int maxc = 64472;
+ if (header && len > maxc)
+ return -1;
+
+ do {
+ char *out = NULL;
+ size_t olen;
+ size_t clen = len < maxc ? len : maxc;
+ r = deflateRecord(buffer, clen, &out, &olen, header);
+ if (!r) {
+ size_t n = gnutls_record_send(session, out, olen);
+ if (n != olen)
+ r = -1;
+ }
+ free(out);
+ buffer += clen;
+ len -= clen;
+ } while (len && !r);
+ return r;
}
static int rnet_recv(gnutls_session_t session, struct rnet_message **message)
{
- char *out;
- size_t olen;
- int r;
+ char *out = NULL;
+ size_t olen = 0;
char *buffer;
size_t len;
rnet_message_expand(message, 6);
buffer = (*message)->buffer;
- r = gnutls_record_recv(session, buffer, 6);
+ gnutls_record_recv(session, buffer, 6);
if (buffer[0] == 0x01) {
- len = chars2len(buffer+1);
+ len = chars2len((unsigned char *) buffer+1);
rnet_message_expand(message, len);
buffer = (*message)->buffer + 6;
- r = gnutls_record_recv(session, buffer, len);
+ gnutls_record_recv(session, buffer, len);
inflateRecord(buffer - 6, len + 6, &out, &olen);
rnet_message_del(*message);
*message = NULL;
(*message)->len = olen;
free(out);
} else {
- len = chars2len(buffer+1);
+ len = chars2len((unsigned char *) buffer+1);
rnet_message_expand(message, len - 1);
buffer = (*message)->buffer + 6;
- r = gnutls_record_recv(session, buffer, len - 1);
+ gnutls_record_recv(session, buffer, len - 1);
(*message)->len = len + 4;
rnet_message_strip(*message, 4);
}
return 0;
}
-static void save_rec_file(char *cpf, char *buffer, int len)
+static int open_rec_file(char *cpf, struct rnetclient_args *args)
{
int fd;
- char *filename;
- char *home, *tmpdir;
- mode_t mask;
- size_t fnlen;
- int r;
- home = getenv("HOME");
- if (!home) {
- tmpdir = getenv("TMPDIR");
- if (!tmpdir)
- tmpdir = "/tmp";
- home = tmpdir;
+ char *path, *tmp;
+
+ path = args->output_dir;
+
+ /* Now it's time to decide which filename to write. We use
+ the declaration's filename as a base layout, because the
+ proprietary version of the IRPF program only recognizes
+ receipts if they have the same name as the declaration
+ files (disconsidering the extensions). For example, if the
+ declaration file is named "123.DEC", the receipt should be
+ named "123.REC". Therefore, if the declaration file has
+ the ".DEC" extension, we strip it out and add the ".REC".
+ Otherwise, we use the default template, which is to save
+ the receipt with the name "$CPF.REC". */
+ tmp = strstr(args->input_file, ".DEC");
+ if (tmp != NULL && tmp[sizeof(".DEC") - 1] == '\0') {
+ char *p;
+ /* We found the ".REC" extension. */
+ p = strdup(basename(args->input_file));
+ /* Replacing the ".DEC" by ".REC". Fortunately, we
+ just have to change one letter. */
+ tmp = strstr(p, ".DEC");
+ tmp[1] = 'R';
+ snprintf(args->output_file, PATH_MAX, "%s/%s", path, p);
+ free(p);
+ } else {
+ /* The declaration filename does not follow the
+ convention, so we will not use it as a template.
+ We just generate a filename using "$CPF.REC". */
+ snprintf(args->output_file, PATH_MAX, "%s/%s.REC", path, cpf);
}
- fnlen = strlen(home) + strlen(cpf) + 13;
- filename = malloc(fnlen);
- snprintf(filename, fnlen, "%s/%s.REC.XXXXXX", home, cpf);
- mask = umask(0177);
- fd = mkstemp(filename);
+ /* Now, open the file and write. */
+ fd = open(args->output_file, O_CREAT | O_WRONLY | O_EXCL, S_IRUSR | S_IWUSR);
if (fd < 0) {
- fprintf(stderr, "Could not create receipt file: %s\n",
- strerror(errno));
- goto out;
+ fprintf(stderr, "Could not create receipt file \"%s\": %s\n",
+ args->output_file, strerror(errno));
}
- r = write(fd, buffer, len);
+ return fd;
+}
+
+static int save_rec_file(int fd, char *buffer, int len, const struct rnetclient_args *args)
+{
+ ssize_t r;
+
+ do {
+ r = write(fd, buffer, len);
+ } while (r < 0 && errno == EAGAIN);
if (r != len) {
- fprintf(stderr, "Could not write to receipt file%s%s\n",
- r < 0 ? ": " : ".",
- r < 0 ? strerror(errno) : "");
- goto out;
+ fprintf(stderr, "Could not write to receipt file: %s",
+ strerror(errno));
+ } else {
+ fprintf(stderr, "Wrote the receipt file to %s.\n",
+ args->output_file);
}
- fprintf(stderr, "Wrote the receipt to %s.\n", filename);
-out:
- close(fd);
- free(filename);
- umask(mask);
+ return r;
}
-static void handle_response_text_and_file(char *cpf, struct rnet_message *message)
+static void handle_response_text_and_file(int fd, struct rnet_message *message, const struct rnetclient_args *args)
{
char *value;
int vlen;
if (!rnet_message_parse(message, "texto", &value, &vlen))
fprintf(stderr, "%.*s\n", vlen, value);
if (!rnet_message_parse(message, "arquivo", &value, &vlen))
- save_rec_file(cpf, value, vlen);
+ save_rec_file(fd, value, vlen, args);
}
-static void handle_response_already_found(char *cpf, struct rnet_message *message)
+static void handle_response_already_found(int fd, struct rnet_message *message, const struct rnetclient_args *args)
{
- handle_response_text_and_file(cpf, message);
+ handle_response_text_and_file(fd, message, args);
}
static void handle_response_error(struct rnet_message *message)
int main(int argc, char **argv)
{
int c;
- int r;
+ int r = 0;
struct rnet_decfile *decfile;
struct rnet_message *message = NULL;
+ struct rnetclient_args rnet_args;
gnutls_session_t session;
int finish = 0;
char *cpf;
-
- if (argc < 2) {
- usage();
+ error_t err;
+ char cwd[PATH_MAX];
+ int outfd;
+
+ /* Parsing the command line arguments. The argp_parse
+ function calls exit() if there is some error during the
+ parsing process (e.g., the user has provided an unknown
+ flag or the parsing function has called argp_error).
+ However, if our internal parsing function returns something
+ different than zero, then argp_parse returns this value to
+ us. This is a bug, and should not happen in the current
+ state. */
+ memset(&rnet_args, 0, sizeof (rnet_args));
+ rnet_args.server_name = RNET_ADDRESS;
+ rnet_args.client_version = RNET_DEFAULT_VERSION;
+ err = argp_parse (&rnetclient_argp, argc, argv, 0, NULL, &rnet_args);
+ if (err != 0)
+ fprintf(stderr, "internal error while parsing command line arguments.");
+
+ /* If the user provided the output directory where she wishes
+ to save the receipt, then we use it. Otherwise, we save
+ the file in the current working directory (CWD). */
+ if (rnet_args.output_dir == NULL) {
+ rnet_args.output_dir = getcwd(cwd, PATH_MAX);
+ } else {
+ struct stat st;
+ if (stat(rnet_args.output_dir, &st) < 0) {
+ fprintf(stderr, "Could not stat directory \"%s\": %s\n",
+ rnet_args.output_dir, strerror(errno));
+ exit(1);
+ }
+ if (!S_ISDIR(st.st_mode)) {
+ fprintf(stderr, "Error: \"%s\" is a not a directory.\n",
+ rnet_args.output_dir);
+ exit(1);
+ }
}
- decfile = rnet_decfile_open(argv[1]);
+ decfile = rnet_decfile_open(rnet_args.input_file);
if (!decfile) {
- fprintf(stderr, "could not parse %s: %s\n", argv[1], strerror(errno));
+ fprintf(stderr, "could not parse file \"%s\": %s\n", rnet_args.input_file, strerror(errno));
exit(1);
}
cpf = rnet_decfile_get_header_field(decfile, "cpf");
+ outfd = open_rec_file(cpf, &rnet_args);
+ if (outfd < 0) {
+ r = 1;
+ goto out_rec;
+ }
+
gnutls_global_init();
session_new(&session);
- r = connect_rnet(&c);
+ r = connect_rnet(&c, rnet_args.server_name);
if (r) {
fprintf(stderr, "error connecting to server: %s\n",
r == EAI_SYSTEM ? strerror(errno) : gai_strerror(r));
- exit(1);
+ r = 1;
+ goto out_connect;
}
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t)(intptr_t) c);
r = handshake(c);
if (r < 0) {
- exit(1);
+ r = 1;
+ goto out_handshake;
}
- if ((r = gnutls_handshake(session)) < 0)
+ if ((r = gnutls_handshake(session)) < 0) {
fprintf(stderr, "error in handshake: %s\n",
gnutls_strerror(r));
+ r = 1;
+ goto out_handshake;
+ }
+
+ r = rnet_encode(decfile, &message, rnet_args.client_version);
+ if (r < 0) {
+ fprintf(stderr, "error encoding message, file not supported?\n");
+ r = 1;
+ goto out;
+ }
- rnet_encode(decfile, &message);
rnet_send(session, message->buffer, message->len, 1);
rnet_message_del(message);
r = rnet_recv(session, &message);
if (r || !message || message->len == 0) {
fprintf(stderr, "error when receiving response\n");
+ r = 1;
goto out;
}
switch (message->buffer[0]) {
case 1: /* go ahead */
- handle_response_text_and_file(cpf, message);
+ handle_response_text_and_file(outfd, message, &rnet_args);
break;
case 3: /* error */
handle_response_error(message);
finish = 1;
break;
case 4:
- handle_response_already_found(cpf, message);
+ handle_response_already_found(outfd, message, &rnet_args);
finish = 1;
break;
case 2:
case 5:
- handle_response_text_and_file(cpf, message);
+ handle_response_text_and_file(outfd, message, &rnet_args);
finish = 1;
break;
}
r = rnet_recv(session, &message);
if (r || !message || message->len == 0) {
fprintf(stderr, "error when receiving response\n");
+ r = 1;
goto out;
}
switch (message->buffer[0]) {
case 4:
case 5:
case 1:
- handle_response_text_and_file(cpf, message);
+ handle_response_text_and_file(outfd, message, &rnet_args);
break;
}
out:
gnutls_bye(session, GNUTLS_SHUT_RDWR);
+out_handshake:
close(c);
- rnet_decfile_close(decfile);
+out_connect:
gnutls_global_deinit();
+ close(outfd);
+out_rec:
+ rnet_decfile_close(decfile);
- return 0;
+ return r;
}
projects / cascardo / rnetclient.git / blobdiff